Styles 5; stigmas terminal, depressed capitate or terete; calyx limb scarious, inflated or expanded; corolla with petals connate only at base.

• 花柱5；柱头顶生，下凹的或圆柱状；萼檐干膜质，膨大的或膨大；花冠具花瓣合生的只在基部。(4